If you are using Google Earth, you might have used Google Sky feature (by downloading) which shows night sky imagery. Google has now released that feature for web. Visit Google Sky to see it. Here are some features in Google Sky:
- Search thousands of objects
- Try switching to infrared, microwave, ultraviolet, or x-ray to see the sky in a completely different light.
- Galleries highlighting the best images from Hubble and many other telescopes.
- Current planet positions and constellations.
- Earth and Sky podcast gallery
Source: Google Lat Long Blog.